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 * and open the template in the editor.
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import BLL.BUser;
import DTO.User;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Vien-IT
 */
public class servlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
   

    
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        HttpSession session = request.getSession();
        String user, pass;
       PrintWriter out = response.getWriter();
          request.setCharacterEncoding("UTF-8");  
       response.setContentType("text/html;charset=UTF-8");
        String action = request.getParameter("action");
        if(action.equals("register"))
        {
            user = request.getParameter("username");
            pass = request.getParameter("password");
            DTO.User aUser = new User();
            aUser.setUsername(user);
            aUser.setPassword(pass);
            aUser.setEmail(request.getParameter("email"));
            aUser.setAddress(request.getParameter("address"));
            aUser.setNumberPhone(request.getParameter("numberPhone"));
            new BUser().insert(aUser);
            session.setAttribute("username", user);
            response.sendRedirect("index.jsp");
        }
        else       if(action.equals("login"))
        {
            user = request.getParameter("username");
            pass = request.getParameter("password");
            if(new BUser().isUser(user, pass))
            {
                session.setAttribute("username", user);
                 response.sendRedirect("index.jsp");
            }
            else
            {
                response.sendRedirect("index.jsp?err=true");
            }
        }
       
    }

    
}
